Tesla might have just released its coolest Easter Egg yet. As discovered by the Tesla community and confirmed by Teslarati this weekend, the electric car maker has released an Easter Egg on the Tesla mobile app consisting of several references to the Back to the Future franchise. The fun, hidden feature is accessible for Model 3, Model S, and Model X, owners, and is compatible with both iOS and Android devices.

Accessing Tesla’s Back to the Future Easter Egg on the mobile app requires some geek knowledge of the iconic, classic, sci-fi franchise. To access the Easter Egg, owners would need to tap the battery gauge on the Tesla mobile app. when the vehicle has 121 miles of range remaining. Once tapped, a message would appear onscreen featuring the first references to the Back to the Future franchise – “Ensure plutonium fuel is inserted into reactor chamber and press “Yes” to continue.”

Tesla’s ‘Back to the Future’ Easter Egg. (Photo: Teslarati)

Upon pressing “Yes,” a gray Model X named “Outatime” would be displayed on the Tesla mobile app. The battery icon, which will show 1.21 Gigawatts, will also be yellow with a toxic symbol on it — a reference to the plutonium-fueled nuclear reactor used in the original DeLorean time machine. It should be noted that 1.21 GW is the output of the time machine’s plutonium reactor (or the lightning strike in the first movie), and “Outatime” is the vanity plate of the DeLorean time machine.

In true Tesla form, these are but the tip of the iceberg, as more Back to the Future references are present. The location displayed on the Easter Egg, 1600 S Asuza Ave, Rowland Heights, CA, is the exact location of the fictional Twin Pines Mall, where Marty and Doc Brown meet at the beginning of the first firm. Schedule Service will also display an upcoming appointment on November 5, 1955 at 6:00 a.m. — the date where Marty, the franchise’s main character, started his one-week stay in 1955 after escaping in the DeLorean time machine in 1985.

Quite impressive in this new Back to the Future Easter Egg are the added details that references the iconic movie franchise. At the bottom of the mobile app’s screen, the vehicle will be listed as a Model X P88D, a clear reference to the 88 mph speed required for the DeLorean time machine to travel through time. The Version displayed on the app will also be listed as 1985.43, referencing the year where the original events of Back to the Future took place. Lastly, and perhaps most impressive, was the VIN SCEDT26T6BD005261 that is listed on the Easter Egg. A search for the VIN reveals it to be a DeLorean DMC12, the exact same car used in the movie.

With a ton of Back to the Future references, Tesla’s latest Easter Egg is most probably its geekiest yet. The added hidden factor, highlighted by its activation at 121 miles, makes it even cooler.